[DMC #25] Make DocumentMarker::GetType() virtual

third_party/WebKit/Source/core/editing/markers/CompositionMarker.h

Index: third_party/WebKit/Source/core/editing/markers/CompositionMarker.h
diff --git a/third_party/WebKit/Source/core/editing/markers/CompositionMarker.h b/third_party/WebKit/Source/core/editing/markers/CompositionMarker.h
index 719b9e049d380af051c8bef72fe108d4de9f9a48..9fe170cf81bcf598fbfc57b652ce6fbceb0a8027 100644
--- a/third_party/WebKit/Source/core/editing/markers/CompositionMarker.h
+++ b/third_party/WebKit/Source/core/editing/markers/CompositionMarker.h
@@ -22,6 +22,10 @@ class CORE_EXPORT CompositionMarker final : public DocumentMarker {
                     bool thick,
                     Color background_color);
 
+  // DocumentMarker implementations
+  MarkerType GetType() const;

[yosin_UTC9, 2017/05/29 05:17:08]

nit: s/;/final ;/

+
+  // CompositionMarker-specific
   Color UnderlineColor() const;
   bool Thick() const;
   Color BackgroundColor() const;